Part of a high rise window fell from the heritage-listed Transpower House to The Terrace pavement below in central Wellington at about 8pm last night.

Security guards were posted outside the cordoned off building overnight to warn late night pedestrians of the threat from the remaining portion of the window, which this morning remained precariously lodged in its frame several floors above street level.

A team of abseilers from Abseil Access were on the job about 6:45 this morning dealing with the high-altitude broken glass problem. The issue has now been resolved.

Shell House was one of the first modern tower blocks on The Terrace in Wellington, an area now dominated by office high-rise buildings.

It underwent an internal fitout and significant earthquake strengthening more than a decade ago. Both projects were completed by a Wellington-based building company in 2003.